Common Tire Wear Patterns & Causes Chart - Diagnosis and Corrections

This document is a scanned reference chart titled "Common tire wear patterns and causes." It is organized as a table with three rows, Condition, Effect (shown via illustrations), Cause, and Correction, across seven tire wear conditions: rapid wear at shoulders, rapid wear at center, cracked treads, wear on one side, feathered edge, bald spots, and scalloped wear. For each condition, the chart identifies the underlying cause: under-inflation or lack of rotation (shoulder wear), over-inflation or lack of rotation (center wear), under-inflation or excessive speed (cracked treads), excessive camber (one-side wear), incorrect toe (feathered edge), unbalanced wheel or tire defect (bald spots), and lack of tire rotation or worn/out-of-alignment suspension (scalloped wear). Corrections listed include adjusting tire pressure to specifications when tires are cool and rotating tires; adjusting camber to specifications; adjusting toe-in to specifications; dynamic or static wheel balancing; and rotating tires plus inspecting the suspension. A footnote advises having the tire inspected for further use in cases marked with an asterisk (cracked treads and tire defect). Illustrations depict each wear pattern on the tread and cross-section views showing inflation effects and alignment conditions. The chart is a general diagnostic aid useful for identifying alignment, inflation, balance, and rotation problems from visible tread wear.